[GENERAL] Some Fixes and Improvements.

* phpdoc comments
* translations
* generate layout.css with lessc
* added street, birthDay, birthMonth, birthYear, houseNumber, ... to UserInfo
* added currentStateIndicator to EducationFiedset, EmploymentFieldset
* removed EducationInterface, ...
* added Apply Link to the Joblist
* Add some interfaces
* Adds translations for form errors